use records as exceptions

1 files changed, 39 insertions, 0 deletions

diff --git a/mcgoron.iterator.exceptions.sld b/mcgoron.iterator.exceptions.sld
new file mode 100644
index 0000000..b989a6c
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+++ b/mcgoron.iterator.exceptions.sld
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+#| Copyright 2024 Peter McGoron
+ |
+ | Licensed under the Apache License, Version 2.0 (the "License");
+ | you may not use this file except in compliance with the License.
+ | You may obtain a copy of the License at
+ |
+ |     http://www.apache.org/licenses/LICENSE-2.0
+ |
+ | Unless required by applicable law or agreed to in writing, software
+ | distributed under the License is distributed on an "AS IS" BASIS,
+ | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ | See the License for the specific language governing permissions and
+ | limitations under the License.
+ |#
+
+(define-library (mcgoron iterator exceptions)
+  (import (scheme base))
+  (export field-not-found-exception field-not-found-exception?
+          field-not-found-exception:field
+          field-not-found-exception:iterator
+          non-integer-movement-exception non-integer-movement-exception?
+          non-integer-movement-exception:spaces
+          negative-movement-exception negative-movement-exception?
+          negative-movement-exception:spaces)
+  (begin
+    (define-record-type <field-not-found-exception>
+      (field-not-found-exception field iterator)
+      field-not-found-exception?
+      (field field-not-found-exception:field)
+      (iterator field-not-found-exception:iterator))
+    (define-record-type <non-integer-movement-exception>
+      (non-integer-movement-exception spaces)
+      non-integer-movement-exception?
+      (spaces non-integer-movement-exception:spaces))
+    (define-record-type <negative-movement-exception>
+      (negative-movement-exception spaces)
+      negative-movement-exception?
+      (spaces negative-movement-exception:spaces))))
+